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-   -   DIY Thermostat Replacement WITHOUT DRAINING The Coolant! (http://forum.e46fanatics.com/showthread.php?t=964670)

KH0 01-09-2013 04:32 AM

DIY Thermostat Replacement WITHOUT DRAINING The Coolant!
 
Hello All,

I am in the process of doing a Thermostat Replacement on my 2000-2001 BMW 323i Manual.

I was just wondering if I would encounter any issues if I were to do the Thermostat Replacement Without Draining The Coolant as the temperature outside is below freezing and I don't want to go through all the trouble.

How much Coolant would it actually spill upon opening the Thermostat and the Hoses?

I would also appreciate any tips / tricks / pointers.

Thank You.

TurnersInOz 01-09-2013 05:02 AM

T-stat and hoses?
Between the bottom hose and t-stat you'll be draining pretty much all of it any way you look at it.

mkodama 01-09-2013 05:06 AM

If it's just the thermostat and not the hoses, you'll probably only lose a quart of coolant.

KH0 01-09-2013 05:15 AM

Quote:

Originally Posted by mkodama (Post 15044059)
If it's just the thermostat and not the hoses, you'll probably only lose a quart of coolant.

Hello,

But don't I need to remove the hoses to get the Thermostat out?

Thank You.

KH0 01-09-2013 05:15 AM

Few people here did it without Draining...

http://forum.e46fanatics.com/showthread.php?t=219433

mkodama 01-09-2013 05:17 AM

Quote:

Originally Posted by KH0 (Post 15044061)
Hello,

But don't I need to remove the hoses to get the Thermostat out?

Thank You.

No, just disconnect the ends of the hoses connected to the thermostat.

KH0 01-09-2013 05:24 AM

Quote:

Originally Posted by mkodama (Post 15044065)
No, just disconnect the ends of the hoses connected to the thermostat.

Hello,

Yes, that's what I ment :facepalm:

THANK YOU.

KH0 01-09-2013 10:10 PM

1 Attachment(s)
Very disappointed to find Partially Shorted 10mm Bolts on the bottom.

Halted the process of replacement and the car.

Any Advice?

Thank You.

:cry:

mkodama 01-09-2013 11:23 PM

No clue what you just said or what that picture is of.

KH0 01-09-2013 11:26 PM

Quote:

Originally Posted by mkodama (Post 15046874)
No clue what you just said or what that picture is of.

LOL

Picture of Bolts that has no thread :(

dino71 01-10-2013 02:32 PM

Quote:

Originally Posted by mkodama (Post 15046874)
No clue what you just said or what that picture is of.

Do not use crappy cell phones to take pictures, use a big boy camera.

KH0 01-14-2013 07:57 PM

Finally Done :clap:

A simple straightforward work that turned into some unexpected issues especially when working below freezing temperatures.

Majority of the unexpected issues will arise when taking apart the old Thermostat.

2 Bolts at the bottom (Rusted, Seized, & Striped)

http://forum.e46fanatics.com/attachm...1&d=1357787370

At first decided to do the work without removing the Electric Fan as I mentioned earlier as the temperature outside was below freezing and I don't want to go through all the trouble, but finally decided to remove it as it was getting harder and harder to disconnect the bottom hose from the Thermostat. I also had a minor issue while removing the fan http://forum.e46fanatics.com/showthr...280&highlight=

When the old Thermostat was out everything went real smoothly.

BTW: You can do it without draining the coolant as it only spills out a handful, but a safe practice would be to washing off the area of the spill before starting the vehicle.

Thank You.

flashmeow 01-14-2013 08:39 PM

Please consult with Mango for all of your cooling question. he is the forum's subject matter expert and should be able to help you more effectively

I hope this helps. Good luck

tcphoto 01-14-2013 11:02 PM

I did this project a week ago and not removing the fan and shroud would make it nearly impossible. There is only a few inches between the components and you certainly don't want to damage the fan.

KH0 01-24-2013 04:06 PM

Quote:

Originally Posted by tcphoto (Post 15061745)
I did this project a week ago and not removing the fan and shroud would make it nearly impossible. There is only a few inches between the components and you certainly don't want to damage the fan.

Not Impossible, But Hard LOL


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